Valve-stem carbon remover



July 24, 1923.

A. R. .SCHMIDT VALVE STEM CARBON 4REMOVEIR Filed May l2, 1921 @WS 11 1H fr@ FIG. 2

Patented July 24, 1923.

*ALBERT n; Semarnat, or'

IIIILWAUKEE, WISCONSIN.

vatvn-s'iEi/iY CARBON nui/LOVER.

p application filed May i2,

T 0 @ZZ whom it may concer/n Be it known that I, ALBERT R. SCHMIDT, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of `Wisconsin, have invented new and useful Improvements in ValveeStem Carbon Removers, of which vthe following is a description, reference being had to the accompanying drawings, whichV are a part of this specification. y

This invention relates to improvements in valve stem carbon Vremovers, more .parh indicates the upper portion of Vticularly adapted for internal combustion engines.

rlhe ordinary internal combustion engine is provided with tappet valvesfor controlling the charge inlet and the exhaust outlet openings of the cylinders, and these valves have stems which are guided and extend outwardly through portions of the cylinders to the reciprocating mechanism. The portions of the valve stems within the exhaust passageways are exposed to the exhaust gases, which cover the valve stems with carbon and have a very corrosive action upon the stems and cause them to stick, and the valves cannot reciprocate to open or closed posit-ion, and it is necessary to take the engine apart to clean the valves. This necessitates comparatively expensive repair bills, and is otherwise objectionable.

It is one of the objects of this invention to overcome these objectionable features and provide a means for removing carbon from the valve stems which is automatic in its action and does not require any attention.

A. further object of the invention is to provide a valve stem carbon remover which may be easily placed within the ordinary engine without requiring any changes in the construction.

A. further object of the invention is to provide a valve stem carbon remover having means for eliminating noise from the movable parts.

A further object of the invention is to provide a valve stem carbon vremover which is of simple construction, is strong and durable, and is well adapted for the purpose described.

With the above and other objects in view, the invention consists of the improved valve stein carbon remover and its parts and 1921,. Serial No. 468,917'.

In the accompanying drawing in which the same reference characters indicate the same parts in all of the views:

Fig. l is a vertical sectional view of the upper portion of an internal combustion en gine provided with the improved carbon remover; and y Fig. 2 is a perspective view of the remover.

Referring to the drawing, the numeral 5 an internal combustion engine which is provided with the usual exhaust opening 6 lcontrolled by a tappet valve 7. The valve is formed with a stem 8 which extends reciprocally through the guide 9 and is heldin closed position by a coiled spring l0. A rocker arm 1l actuated by -a push rod l2 moves the valve to open position. The portion 8 of the valve stem between the valve 7 and the guide 9 is in the path of the exhaust gases, and carbon and burnt oil settle on the stem` and interfere with the free movement of the stem in its guide and prevent the closing of said valve and consequently loss of compression and ignition of the charge with the result that the charge is wasted.

It has been found that if a loose member 13 preferably formed of metal is placed around the valve stem, between the valve `and the guide, yso it could freely slide up and down and vibrate sideways on the stem, the constant agitation of the member will prevent carbon from settling on the stem or scrape off any particles that do settle, with the result that the stem is maintained in a clean condition and will not stick in the guide.

To deaden or eliminate the noise of the vibrating member, said member is preferably split as indicated by the numeral 14.

It is to be understood that each exhaust valve stem of a multi-cylinder engine is to be provided with the annular members, and that the inlet valve stems may also be provided with the rings or washers, if desired.

While the remover has been described as a ring or washer, it is to be understood that any kind of an annular member may be loosely mounted on the valve stem.

From the foregoing description it will be Il l) Seen that the valve stem carbon remover isv of very simplev construction, is strong and durable and is yWell adapted for 'the p urpcee described. 3

llVhat l claim as my invention is:

l. The combination'Withfan internal combustion engine having` a valve provided with a guided stem,of a means for preven'ti'ngl the formation of carbon on the valve stem, consisting of a member loosely `mounted on the stem between the `valve portion and the stem guide and freely movable laterally and vertically thereon independently of the movement ofthe valve. l l

2. The combination With an internal'com# bustion engine having a valveuopening` and Iaval'vestem guide, a'val've closing said opening and having` ay stem guided in said guide, and a ring-like member loosely mounted on the valve stem between ythe valve portion and, the stem gu'ideand freely movable laterally and vertically thereon in-V dependently of the movenient of the valve or 'removing ez'rrbon therefrom.

L3. The combination With an internal com,- bustion engine having a valve opening and ya valve stem guide, a 'reciprocal valve closing said opening and having a valve stem lit ring-like member loosely 'mounted' on At ie valve stem Ibetween Ithe valve portion and the stem guide andffreely valve portion "and the ture.

movable laterally and vertically thereon independently of the movement of the valve for removing carbon therefrom.

'4. The combination With anl internal combustion overhead valve engine having an `exhaust :opening and a valve stem guide, a reciprocal valve controlling said exhaust opening, and a ring-lille member loosely mounted on the valve stem between the stem guide and freely movable laterally and vertically thereon independently `of the movement of the valve for removing carbon therefrom.

5. The `combination vwvith an internal combustion overhead valve engine havingf an exhaust duct kand a 'valve opening leading thereto, said engine also having,` a tubular valve stem guide extending' vertically into theexhaustduet above the valve opening, a reciprocal valve` controlling the valve opening and` having,` a valve stem reciprocally 'extending through `the valve ste `guide and freely movable laterally and verfticallythereon independently of the movement of the valve, and a split ring-like niemyber `loosely mounted `on the valve stem be,- 'tv'eenthe valve portion andthe `stem guide for ieniovi'iigcarbon the from.

In testimony whereof, l affix my signa.-

ALBERT i "R. sei-imnf'r. 

